Door lock



Nov. 15, 1927. 1 649 424 C. TIRONE DOOR LOCK File'd 001'.. 18l 1926 lzverzZav;

Patented Nov. 175, 1927.'

A UNITED STATES cHAnLnsTIno-Nn, oF BUFFALO, NEW YORK.

DOOR LOCK.

Applieationalea octber 1s, 1926. semi No. 142,204.

This invention relates to improvements in key-operated locks for doors and the like. One of itsy objects is the provision'of'a lock of this character which is strong and durable in construction, which is positive and reliable in operation, and which is not liable to gety out of order. *Y

Another object of the invention is` to improve the bolt-operating mechanism of the lock with a'view of preventing unauthorized persons from 'opening it reven though they have a key which might partially open the same. Y

Other features of this invention reside in the construction and arrangement of its parts which will be hereinafter more fully described and particularly pointed out in the appended claims.

In the accompanying drawings Figure `1 is an outside face View of my improved lock with the cover plate removed and showing the main locking bolt open. Figures 2 and 3are views similar. to Fig. 1, but showing the main locking bolt in its partially'y and fully locked positions, respectively.. Figure 4 is a transverse vertical vsection taken substantially in .the plane of line 4-4, Fig. 3. Figures 5 t and 6 are horizontal sections taken on the correspondingly numbered lines in Fig.l 1. Figure 7,

is a fragmentary Vtransverse vertical section on line -7-7,"Fig. 4. Figure 8 .is an enlarged fragmentary horizontal section on line 8 8, Fig. 3. Figure9 is a perspective view` of the; main bolt-locking catch or trigger. 'Y

Similar characters-'ofv reference indicate corresponding parts throughout the several views. kz

The casing 10, in which the various parts of the lock vmechanism are housed, is rectangular in shape, being closed on its outer side. by aV Cover 11 and adapted tobe fastened in a recess 12 in the inside face of the door 13 by screws or .other fasteners. The inside wall of the casing and its cover have aliningkey holes 14 and 15, respectively7 for receiving` the ordinary type of doorkey 16.

Mounted in the upper portion of the cas` ing isa sliding latch-bolt 17 normally held in its projected position by a spring 18 and adapted to be retracted to itsunlocked position from the inside of the door vby a knob 19 and from the outside by the key 16. Said knob carries adisk 20 having an outwardlyfacing lug 21 engaging the llanged rear wall 22 of an opening 23 formed in the latch-bolt. The latter is guided on a pin 24 engaging a longitudinal slot 25 therein and is actuated by the key through the medium of a thrust lever 26 fulcrumed intermediate its ends on a pivot pin 27 and having an outwardlyprojecting stud 28 onits upper arm loosely engaging an opening 29 in the latch-bolt. The lower arm of this thrust lever terminates in a tail 30 with which the bit of the key is adapted to engage for rockingsaid lever in a direction to retract the latch-bolt.

Arranged below and parallel with the latch-bolt 17 is the main locking-bolt 31 which partly overlies that vportion of the thrust lever above its tail 30 and which is held in and urged toits retracted position engage for holding the latter in its open retracted position or in its initial projected Aposition shown in Figs. 1 and 2, respectively.

The lower edge of the tumbler adjacent its fulcrum is inclined to provide a cam face 40 with vwhich the key-bit is adapted to engage for swinging the tumbler upward to release itA from the locking-bolt stop pin 39 during the projecting and retracting movements of the bolt. In its lower edge the locking-holt has a pair of longitudinally spaced shoulders 41, 42 with which the bit of the key is adapted to successively engage when the key is given two turns, the first turn projecting the bolt to the position shown in Fig. 2 and the second turn to that shown in Fig. 3. It will be noted that the shoulder 42 is in the form of a depending tooth and the location of the shoulders is such that the toothedshoulder is out of the path of the key-bit, during the first turn, while the companion shoulderv 41 is in its path to project the bolt 31 from its fully retracted position to its initially locked position. After the first turn of the key, the toothed shoulder is in position to be intercepted by the key-bit and thus cause the bolt to be thrown to its fully 1locked position upon the neXt turn of the rey.

Means independent of the tumbler -34 are provided for holding the locking bolt 31 in its fully projected position. The preferred means shown in the drawings, particularly Figs. 7, 8 and 9, consists ofa locking catch or trigger 43 movable into and out of engagement with the rear edge 44 of the locking bolt. rIhis` catch is disposed between said bolt and the inner wall of the casing 10, and it is fulcrumed on a pivot pin 45 arranged lengthwise of the bolt. A iiat spring` 46 constantly tends to throw the upper arm of the catch outwardly into engagement with they bolt, and such upper arm has an extension 47 having a beveled face 48 with which a sliding keeper 49, controlled b-y a knob 50 on the inside of the door, is adapted to engage for holding the catch clear of the bolt when desired. The lower arm oic this catch terminates in an offset lip or flange 51 with which the bit of the key 16 is adapted toengage for unlocking the bolt from the outside and allowing it to be returned by its spring 32 from the position shown in Fig. 3 to that shown in Fig. 2. 1n releasing the catch with the key, the latter is'placed in the position shown by dotted lines in Figs. 3 and 8, wherein thc key-bit is behind the catch-lip 51, so that when the key is pulled outwardly the catch is actuated. Then thekeeper 49 is in its released position, the catch 43 bears against the inner side or thelocking-bolt ready to snap into locking engagement therewith -when it is fully projected.

Briefly stated, the operation of this improved lock is as follows Assume the parts to be in the position shown by full lines in Fig. 1, wherein the latch-bolt 17 is projected andthe lockingbolt 31 is fully retracted. To open the door from the inside, the knob 19 is rotated to f retract the latch-bolt, and to accomplish the sainey act 'from'the outside, the key y1G fis placed in the key-hole and turned a quarter of a revolution in a clockwise direction to shift the thrust lever 26 and said latch-bolt to the position shown by dotted lines in said gure. 1n projecting the lockiiig-bolt,`from either inside or outside ot the door,v to the successive projected positions shown in Figs. 2 and 3, respectively, the key is turned two complete revolutions, the first turn releasing the tumbler 34 momentarily from the locking-bolt stop pin 39 to allow the key, upon engagement with the shoulder 41, to project the bolt its initial step, and the second turn acting likewise to project the bolt to its fully locked position, the same being held in such position by the catch 43. To unlock the bolt 31 from the inside, the keeper 49 is slid in a direction to release the catch 43 and 'allow the bolt to be returned-by its spring 32 to the position shown in Fig. 2, after which the key is employed to effect the iinal withdrawal of the bolt. When unlocking the bolt from the outside, the key-bit is iirst engaged with the catch-lip 51 to release the bolt and permit its initial return, the key be'- ing then turned in an obvious manner to etfeet` its complete withdrawal.

1t will be observed that the key-bit is provided -with a' ward or notch 52 which is wide enough to freely pass and clear the locking bolt 31 in turning the key in a direction to effect its final opening movement.

1 claim as my invention 1. A' lock comprising a main locking bolt, a latch-bolt, separate means for yieldingly resisting the projection of the locking-bolt and the retraction of the latch-bolt, and separate key-operated means for operating said bolts independently of each other, said means being disconnected from feach other and arranged in the path of movement of the key to be directly lactuated thereby.

2. A lock comprisinga main' locking-bolt, a latch-bolt, separate means foryieldingly resisting the'projection of t-he locking-bolt and the retraction of the' latch-bolt, and independent key-controlled means for releasably holding said locking-bolt in its retracted and projected positions and for moving said latch-bolt to its retracted position, respectively, said means being operable successively by theV same key.

3. A lock comprising a casing having a Y key-hole therein adapted to receive a key, a mainlocking-bolt-having means for yieldingly resisting the projection thereof to its locked position, said bolt being moved to such position by the key, means ycontrolled by the latter for releasably holding the locking-bolt in its projected position, a latch-bolt having means for yieldinglywholding itin projected position, and means operable by the key for moving said latch-'bolt to its ret-racted position, said locking bolt holding means and said latch-bolt operating means having key-engagingpartslocated at differint points in the path of movement ofthe rey.

4. A lock comprising a casing havinga key-hole therein adapted to receive a key, a projectable locking-bolt having a: key-engaging shoulder, a retractable latch bolt, a key operated thrust member` for actuating said bler vfor said locking bolt, the tumbler, the locking-bolt shoulder and the thrust lever being arranged to be successively engaged by the key during its turning movement, and 5 said thrust lever being operable by a `fractional turn of the key in one direction to operate the latch-bolt independently of the locking bolt.

6. A lock for doors, comprising a projectible locking-bolt, a key for operating said 10 bolt, a pivoted catch having one arm arranged to interlock With the bolt for holding it in its locked position, a key-engaging part on the other arm of said catch, and a sliding keeper for the catch controlled from 15 the inside of the door.

CHARLES TIRONE. 

